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Compressor Performance Test

  1. Disconnect pressure line from air drier and attach Pressure Gauge (J-22124-A ) to air drier fitting. Disconnect electrical connector from compressor motor and exhaust solenoid terminals. See Figure .
  2. Connect 12-volt power supply to compressor through ammeter. Current draw must not exceed 14 amps. Replace compressor if current draw is greater than 14 amps. Allow pressure to reach 100 psi (7.03 kg/cm2 ) minimum, and shut off compressor. Allow pressure to stabilize.
  3. If pressure leaks down below 90 psi (6.33 kg/cm2 ) before holding steady but does not reach zero psi, replace head assembly. If pressure leaks down to zero psi, perform compressor/drier leak test. Repair as necessary.
  4. If compressor output is less than 110 psi (7.73 kg/cm2 ), perform compressor/drier leak test. If no is leak found, replace compressor. See COMPRESSOR/DRIER LEAK TEST  .
  5. If compressor does not operate, replace compressor. If compressor operates correctly, reconnect wiring and air lines.
NOTE: If compressor is allowed to run to maximum output pressure of 180 psi (12.7 kg/cm2 ), solenoid exhaust valve will act as a relief valve. This gives a false indication of system leakage.
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